Which operator would you use to check if two values are not equal?

• A. !=
• B. ==
• C. <=
• D. >=

Answer: (A)

The not-equal comparison is used to see when two values differ. It returns true if the values are different and false if they’re the same, which is exactly what you need when you want to take action only when two values don’t match. In code, you’d typically use it in a condition like if (a != b) to run something only when a and b aren’t equal.

The equals operator (==) checks for sameness, not difference. The less-than-or-equal and greater-than-or-equal operators compare order or magnitude, not whether the values are the same, so they wouldn’t express not-equality.